Rolling-mill drive



` 1,439,341. H. H. TALBOT.

noLuNG MILL unive." 4 Y mso mnzl. 192|. z sums-snm l.

Dec. 19, 1922.

1,439,341; H. H. TALBQT. L

ROLLING MILL DRIVE..l

Jig. 3

h www zow'. /gaf raient-@e nee. is, reas.

entre, saar rar x j ynownai) n. rnnnofnorwoosrnn, omo, assiduon, nvMnsnn ASSIGNMENTS, 'ro

MACKTNTOSILHEMPHILL COMPANY, PORATION `OE EENNSYLVANIA.

0F PITTSBURGH, PENNSYLVANIA, A COB.- I

Y ROLLING-Minn Dnivn.

y Appneaenmed .Tune 21,1921. seriaino. 479,2ii1f j Myinventionrelates'toan improve'nient` in means Jfor taking up the'thrust or thedrive shaft or shafts of a continuous rolling? mill in which" the rollshafts are geared through bevel gearing. l

In such installations, there is a constant tendency between theintermeshing bevel teeth to separate under driving strains, due toreaction of the teeth. In ordinary practice, this is resisted by thefaces ot the gear hubs engaging thefends or `the bearing shells of theshaftv bearings, but such practice involves difficulty in distributing`the wear evenly over anumber ofpbearingaresulting in excessive loadagainst one or more ofthe bearing shells, causing excessive wearuandheating. A further objection is that, due to theV excessive wear, thegears are not maintained 1n proper mesh."

ln my invention I provide thrust bearingsuat theend portion of the driveshaft or shafts,'soconstructed as to 'efficiently absorb the thrust,thereby yrelieving the several journal bearings and their shells, andproperly retaining the severallbevel gears in mesh. These thrustbearings are adjustable rortaking up wear and reducing the frio tionlosses to a minimum, and arek furthermore: easilyv accessible foradjustment, repair, or renewal.

In the drawings, showing'one manner ot lutilizing the invention,

Fig. l isa plan view, somewhat diagrammatical, or a continuous yrollingmill provided with the .thrust bearings at the'ends of each main` drivevsha-ft; f

Figs.k 2 and 3 are detail sectional views, enlarged, showing theconstruction or the thrust bearings., as used -for eachl main driveshaft. v i The power lequipment or the mill utilizes two maindrivingshats and 3 respectively, or relatively low and high speed,

shaft 3 `being lconnected with thev driving Y motor 4l throughv its gearwheel v5 and pinion 6 of shaft 7 connected directly withthe motor, `andarranged to ytransmit. power to the finishing aan' or ronsthmugh than#`terposed bevel gearing, at accelerating speeds. vShaft 2 is geared withthe 'motor' shaft through its gear 8 and motor pinionf9.

Shaft 2 transmits power yto, the primary train of rolls through theinterposed bevel gearing, at accelerating lowerspe'eds, as ywill ce'Llbe readily understood by those familiar ywiththe art. l

Thus, shaft `2 'is geared through pairso bevels a, a', 29'; 0, 0'; andd..d, with the yresponding stands 'ol vrolls of theVmilhnot Thus, shaftjis geared; through The thrust bearing `for shaft@v is genern j allyindicatedin Fig. 1 bythe letter A,-`and is at the outermosttail end ofthe shaft, ac ting `to restrain the inward thrust, due to 4theintermeshing bevel'gearsl Thrust bear-kk 'ing B' for shaft is locatednear its-driving end in the rear ofthe last driving bevel L and directlyopposes the backward vthrust of the' 'shaft to maintainfthe properrelation 'of the gears and the shaiftin its bearings.

`For the purpose of easy'insertion or removal without removingth'egears, the parts of ythrust bearing B `are"made in halves. 'Tn each casethethrustbearing A and B is located justv beyond" and in opposingoperavtive relation to the' shell'oic a pillow block or other suitablejournal bearing l0 and 10a. l

By this arrangement, shaft 2 is in tension relation toth'rust bearing Aand shaft B'is `in compression relation' tothrustl bearingB. Thethrustbearings, per se, similar in construction to others in common use,andi do` not claim any novelty in their Vgeneral principle or operationor construc- "are: generally tion, eXcept in combination with aninstalla- 'tion` of' the kind involved@` They are made and adapted tooperate as jrollows:

. Referring to the bearing A,-the opposing race or journal bearing orvpillow` block 10 for'shaft 2 '1s providedwith an ample bear- .ing face,-11v .orreceiving or yopposing :the

thrust and for .transmitting it tothe main foundation or `bed plate 12.vrl, he outer end ot shaft 2 .is annularly recessed by a groove 13inwhich is fitted a split collar 14, ro-

5 t-atable with theshaft land the thrust bearing members, whereby theshaft is re-' 17. A co-acting hub 18 slidably mounted on" v.the .shaft.and also keyed thereto for lrotation has asimilar itiange.l9, and therhubs 1-5 and 18 .are connected for longitudinal .adjustment by bolts 20and ysecuring nntsL as shown. f

The inner lface of hub 18 is spherically concaved .and bears against,thespherically lconvex face .of a washer ,21. Between it and the end ofthe shell of journal bearing `iOare a series of bronze and iron washers29, i

,A surroundingcoping 23 of bearing y10 ,extends-over the washers and.encloses them, as shown. In operation7 inward tension .and pull ofshaft 2 is continuously resisted by vthe thrust bearing A, .and istransmitted .throng-litho several gears .to `the shaft and thenceltln'ough `ring 1st .and the adjusting hubs s-181m the assembled washerswhich absorb the rotative friction ,and ,v eventually vtransmit theythrust .against the resisting journal 'bearing 10.

The other thrust bearing ,B is `generally similar; tothe -one justdescribed,except that 'it opposes the thrust of .the shaft 3 and its.gears from the v`opposite end.

y yheopposingffaee of journal bearing or pillowfbloclr 10a is simi-larto that of bearing 10 and ztransmits the pressure `to the base v"123.The last driving bevel gear is inshouldered .engagement with the shaft3, as' at 13a,

and bevel is keyed to the shaft by .spline 16a. It has a specialflrubconstruction provided with a iange ,15a and a supplemental two-partflange 17 secured ,by bolts 20 and their adjusting nuts. The (2o-actingtwopart hub 18l slidably mounted and keyed is also adjustably connectedby its flange 19a by bolts 20a and the nuts, in the saine manner alreadydescribed.

l Inner face of hub 18 isspherically con caved and bears agaurstthelspherically concaved 'face of washer 21a, between it and 5 the end. ofthe shell of journal bearing Vl0FL :ire the series of bronze and ironwashers vvlhe operation in continuously resisting the i j arward thrustof shaft 3, whereby tomai ntain the severa-l driving bevel gears inoperati-fe relation to the driven bevels is :generalliY the same asalready described.

It will ybe observed that inthe arrangement `of, the mill auditsgearing, utilizing with the prime mover, andeach with its :set

thetwo `main drive shafts 2 .and 3, geared of roll shafts through thepairs of bevel", cach shaft 2 and 3 is subject to a thrust i11-dependent of the other.

parts and driving gears of its shaft, provide for and ensure resistanceto the thrust of all of the gears of each: particular shaft. illso,th atby locating the thrust bearings in -the manner shown, each is capable ofadjustment and function with relation to its particular shaft,permitting vthe strains to be distributeclfand absorbed at locations`convenient and accessible foradjustment, etc.

The presence of the thrust bearings incorporated in ,the powertransmitting installation in the manner shown greatly contributes toease`and reconomy of operation,

reduction of friction losses, maintenance of proper driving engagementbetween the bevel gears,A and general eHiciency of 'the mill and itspower equipment as a whole.

That I claim is:

l. In a continuous metal rolling mill uti lining afdriving shaft andpairs of bevels connecting it with a series of `roll shafts, andajournal bearing` for rthe driving shaft; a thrust bearing of the classdescribed interposed between'the journal bearing anda resistingabutmenton the shaft.

2. In' a continuous .metal rolling mill utilizing a driving shaft andpairs of bevels connecting it with a series of roll shafts,

and a journal bearing` for the driving sha-ft;`

a thrust bearingof the class described comwith the shaft, a relativelyadjustable bearing abutment also rotatable with the shaft, and a seriesof bearing washers interposed between said abut-ment and the journalbearing. Y f

3. In a continuous metal rolling mill utilizing a driving shaft and`pairs of bevels connecting it with a series of roll shafts, and ajournal bearing for the driving shaft; the combination therewith of athrust bearing located near the yend of the shaft be* vond all of saidbevels having bearing engagement with an abutment on the shaft yandopposing bearing` engagement with lan adjacent journal hearing andembodying adjust-ing mecliauisni for raryiirg;` the longitudinallocation of the shaft.

et. In a continuous rolling milch a series of primary rolls and seriesof secondary rolls each haviircr n driving shaft provided with alrivenberel wheel, a mai n drivingshaft for each series each having acorresponding driving bevel wheel, and means for driving each of saidshafts together; a thrust bearing for each maindriving shaft interposedbetween a rotatable abutment on the shaft and an adjacent journalybearing near the end of The location of each thrust bearing, and 'itsmounting with relation to the several other n prising a shaft engagingabutment rotatable lie primary rolls and a Series of secondary rollsrrljacen, v journal hearng'neer Vthe end of each havmg n drrvnxg' Shaftprovlded Wlth each shzrftand embedylng means for eect- 10 zr drlvenbevel wheel, L mam drrvlng shaftffor ing relative longltudmal adjustmentof' each each .5e-ries; each having a corresponding drv- Shaft.

ing bevel wheel, an means for driving each In testimony whereof 'Ihereunto aihx lmy of said shafts. together; athrus'tbearng forsignature. ezrehnlan driving shaft interposed between f v r l :Lrotatable abutment on the shaft andv an n HOWARD H.y TALBOT.l

